Radiometer Crook's

Most hopeless product it is,the blades of the rotator doesnt rotate as given in descripgion even if kept in sunlight.

The media could not be loaded.  It's made of glass with shape of bulb.There's a needle in place of filament and rotating blades are placed at top end.When placed in the Sun the blades rotates.The packing was good, that prevented the glass from breaking.I'm still trying to understand the principle of its working.

The media could not be loaded.  Needs strong light source to work, most household artificial light not enough .

Poor workmanship .

Do'nt buy any more. It does not work.

Good product. Works as expected. Arrived on time, and in good working order.

This product works as expected.

Flimsy design and built quality for the cost